Into a '90 DX? Your going to need a mount kit for any B-series swap. You'll also need a cable tranny, the hydro one attached to a '94+ Integra won't work. You'll also need an pre-OBD distributor, injectors and ECU along with the pre-OBD wiring harness. Probably need to modify the shift linkage as well. The '92+ cars they bolt in, the '91 and older have some issues. Seeya.